JP2002074259A - Information reproducing apparatus and information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a change of code pattern itself which might occur in the future hadleable in a system for reading the optically readable code pattern from an information recording medium and restoring it to original multi-media information. SOLUTION: A macro block header deinterleaving part 80 extracts a macro block header which is required for generating a super macro block from a reproduced block obtained by optically reading the code pattern from the information recording medium. A macro block header ECC part 82 corrects the error of the macro block header. A super macro block header deinterleaving part 88 generates the super macro block from the block on the basis of the error-corrected macro block header. A super macro block header ECC part 90 corrects the error of the generated super macro block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called multimedia including audio information such as audio and music, video information obtained from cameras and video equipment, and digital code data obtained from personal computers and word processors. Information recording medium, such as paper, on which information is recorded as an optically readable code pattern, and an information reproducing apparatus for optically reading a code pattern recorded on such an information recording medium to reproduce original multimedia information About.

[0002]

2. Description of the Related Art Conventionally, various media such as magnetic tapes and optical disks have been known as media for recording voice, music and the like. However, even if these media are made in large quantities, the unit price is somewhat expensive, and a large space is required for storage. Furthermore, if it is necessary to hand over the recorded audio medium to another person at a remote location, it takes time and effort to mail it or take it directly. There was also. Also, other than audio information, video information obtained from cameras, video equipment, etc., and digital code data obtained from personal computers, word processors, etc.
The same applies to the so-called multimedia information as a whole including the above.

Accordingly, the applicant of the present invention has proposed an image information which can be transmitted by facsimile of multimedia information including at least one of audio information, video information and digital code data, and can be copied in large quantities at low cost. The inventors of the present invention have invented a system for recording on an information recording medium such as paper in the form of a dot code as encoded information and a system for reproducing the same.

In the information reproducing system of this patent application, an information reproducing apparatus that optically reads and reproduces a dot code on an information recording medium is held by hand, and the information reproducing apparatus moves along the recorded dot code on the recording medium. A method of reading by manual scanning is disclosed.

[0005]

However, the dot code pattern itself is in the stage of being studied for a structure capable of further improving the recording density, and the information reproducing apparatus and the information recording medium of the above-mentioned patent application have not been able to do so. Flexibility to future changes has not yet been fully considered.

It is also desired that the code pattern be reproduced more reliably.

[0007] The present invention has been made in view of the above points, and an information reproducing apparatus and an information recording medium which can reproduce a code pattern more reliably and can cope with a future change in the structure of the code pattern itself. The purpose is to provide.

[0008]

In order to achieve the above object, an information reproducing apparatus according to the present invention comprises audio information,
Video information, multimedia information including at least one of digital code data is optically read from an information recording medium having a portion recorded with an optically readable code pattern, and the multimedia information is read. A data reproducing unit for optically reading the code pattern and reproducing a first predetermined unit of data from the read code pattern; and a first predetermined data reproduced by the data reproducing unit. Processing information extracting means for extracting processing information necessary for generating a second predetermined unit of data from the unit of data from the first predetermined unit of data; and processing information of the processing information extracted by the processing information extracting means. First error correction means for performing error correction, and processing performed by the first error correction means for performing error correction. A data generation unit that generates the second predetermined unit data from the first predetermined unit data based on the information; and performs an error correction of the second predetermined unit data generated by the data generation unit. And a second error correction unit.

An information recording medium according to the present invention is an information recording medium having a portion in which multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code pattern. An information reproducing apparatus, which is a medium and optically reads the code pattern and outputs the multimedia information, optically reads the code pattern and reproduces a first predetermined unit of data from the read code pattern. A data reproducing unit that performs processing and extracts processing information necessary for generating data of a second predetermined unit from data of the first predetermined unit reproduced by the data reproducing unit from the data of the first predetermined unit. Processing information extracting means, and a first error correcting error of the processing information extracted by the processing information extracting means. Correction means; data generation means for generating the second predetermined unit data from the first predetermined unit data based on the processing information on which error correction has been performed by the first error correction means; And a second error correction unit for performing error correction on the second predetermined unit of data generated by the data generation unit, wherein the code pattern further includes the processing information.

That is, according to the information reproducing apparatus and the information recording medium of the present invention, the data reproducing means of the information reproducing apparatus optically reads the code pattern from the information recording medium, and reads the first predetermined unit of data (block). ), And included in the code pattern necessary for generating the second predetermined unit of data (super macroblock) from the reproduced first predetermined unit of data by the processing information extracting means. Processing information (macroblock header) is extracted from the first predetermined unit of data. Then, the first error correction means corrects the error of the extracted processing information, and the data generation means converts the data of the first predetermined unit based on the error-corrected processing information. The second predetermined unit of data is generated, and the second error correction unit corrects the generated second predetermined unit of data.

That is, when data is lost in the first predetermined unit of data on an information recording medium (paper) in which many errors occur, the data in the second predetermined unit is used according to the information in the processing information. Can be changed adaptively, the addition of invalid information can be minimized, and more valid data (contents of the application file) can be recorded. As a result, the code pattern can be reproduced more reliably. Also, it is possible to provide an information reproducing apparatus and an information recording medium that can cope with a future change in the structure of the code pattern itself.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the embodiments of the present invention, first, as described in Japanese Patent Application No. 5-260464 filed by the applicant of the present invention, in order to facilitate understanding of the present invention. A code pattern of a simple dot code will be described.

As shown in FIGS. 2A and 2B, the dot code 10 has a structure in which a plurality of blocks 12 each composed of a plurality of dots arranged according to data contents are arranged. . That is, the blocks 12, which are data for each predetermined unit, are arranged collectively. One block 12 comprises a marker 14, a block address 16, address error detection data 18, and a data area 20 in which actual data is entered.

Each block 1 constituting the dot code 10
2 are two-dimensionally arranged, and each has a block address 16 added thereto. Its block address 16
Has addresses corresponding to the X address and the Y address. For example, the upper left block in FIG. 2A is (X address, Y address) = (1, 1). On the other hand, the block address of the block on the right side is (2, 1). Similarly, the block address incremented from the right to the block address becomes Y from the bottom.
A block address 16 is added to all blocks 12 in such a manner that an incremented address is added.

Here, the lowermost marker and the rightmost marker are dummy markers 22. In other words, the block 12 for a certain marker 14 is the data obliquely lower right of the four markers 14 including the marker, and the lowermost and rightmost markers are the second lowermost and the second lowermost rightmost markers. An auxiliary marker that is arranged to define a block for the marker, that is, a dummy marker 22.

Next, the contents of the block 12 will be described. As shown in FIG. 2B, a block address 16 is provided between the marker 14 of the block 12 and the marker below.
And the error detection code 18 of the block address is added. Similarly, the block address 16 and its error detection code 18 are located between the marker 14 and the right marker.
Is added. As described above, the block address 16 is arranged on the left and upper sides of the data area 20, and the marker 14 is arranged on the upper left corner. Although the block address 16 is shown as being recorded at two places in one block, it may be at one place. However, by recording at two locations, even if an error occurs due to noise at one block address, it can be reliably detected by detecting the other address. Is more preferred.

By adopting the two-dimensional block division method as described above, the information reproducing apparatus detects four adjacent markers, and performs normalization by equally dividing the markers by the number of dots. Therefore, there is an advantage that it is resistant to enlargement, reduction, deformation, and the like, and is resistant to camera shake and the like.

As for the data dots 24 in the data area 20, for example, one dot has a size of several tens of μm. This can be up to several μm depending on the application and use, but is generally 40 μm.
m, 20 μm, or 80 μm. The data area 20 has a size of, for example, 64 × 64 dots.
These can be freely expanded or reduced to a range in which the error caused by the above-mentioned equal division can be absorbed. Also,
The marker 14 has a function as a position index, and has a size that is not included in the modulated data, for example, a round shape, and a size of, for example, 7 dots or more or 7 × 7 dots relative to the data dot 24. And a circular black marker with. Further, the block address 16 and its error detection data 18 are also constituted by dots similar to the data dots 24.

Next, Japanese Patent Application No. 6-1 by the applicant of the present invention.
As described in detail in Japanese Patent No. 21368, a multimedia paper (MMP) system for recording and reproducing a dot code pattern as an example of a code pattern capable of optically reading multimedia information on an information recording medium such as paper. An example of the hierarchical division of the information transfer protocol in the embodiment will be described. Here, the layer N (N = 1 to 5) protocol is an operation rule for realizing a function necessary for the layer N to respond to a request from an adjacent layer.

As shown in FIG. 3, this hierarchical division has a logically multiple hierarchical structure of layers 1 to 5 on both the recording side and the reproducing side.

On the recording side, first, audio information such as audio and music generated by an application process X, generally, an application program on a computer, video information obtained from a camera, video equipment, etc.
So-called multimedia information including digital code data obtained from a personal computer, a word processor, and the like is recorded on an information layer via an application layer (layer 5) and a presentation layer (layer 4) similarly configured on the computer. MM as device
It is passed to the P recording device 26. The MMP recording device records (transmits) the received data as a dot code pattern optically readable by a data link layer (layer 3), a block data layer (layer 2), and a physical layer (layer 1). 3.) Print recording on the medium 30.

The information recording (transmission) medium 30 is passed to the reproducing side. Alternatively, the code pattern recorded on the medium 30 can be facsimile-transmitted to the reproducing side, and can be printed and recorded on the information recording medium 30 such as paper on the reproducing side.

The MMP reproducing apparatus takes an image of the code pattern recorded on the information recording medium 30 and edits the data in accordance with the restoration process from layer 1 to layer 3 or layer 5 in reverse to the recording process. And passes the resulting data to the playback side. On the reproduction side, the reproduced multimedia information is passed to the application process Y via the processing functions of the layers 4 and 5 as necessary, contrary to the recording side.

Hereinafter, each layer (layer) on the reproduction side will be described in detail, and the recording side will be flipped over from the reproduction side, and the description thereof will be omitted.

FIG. 4 and FIG. 5 are diagrams showing an example of the process of multi-step processing in such a plurality of hierarchical structures on the reproducing side. In these figures, N-SDU
n is the Nth layer service data unit number n (Nth Layer Serv
ice Data Unit, No. n) and N-PDUn are Nth Layer Protocol Data Uni
t, No. n) and N-PCIn are Nth layer protocol control information
ol Information, No. n) (corresponding to various processing information in the present invention), and N-UDn is Nth layer user data nth (Nth La
ADU is the Application Data Unit, ACH is the Application Control Header (Application
Control Header) (n = 1 indicates data, 2 indicates status (state) information, and 3 indicates control information).

First, layer 1 (physical layer) has a basic role of guaranteeing reliable transmission of quantized data of a dot image. This layer 1 defines electrical and physical conditions and various conditions for quantization (that is, simple transfer rules for dot patterns, equalization methods, quantization methods, and the like). The in-layer functions required for the layer 1, that is, the services to be provided, include providing a plurality of transmission media (paper types), allowing a plurality of dot densities, providing a plurality of scanner resolutions, providing and reading a plurality of video signal transmission means. A start / end function can be provided, and if necessary, a plurality of gradation representations of dots (binary, multi-valued), allowance of multiplexed representation of dots (color image capture, transmission), and the like can be included. .

The layer 1, that is, the physical layer, includes a functional module (imaging system module 32) that optically captures a dot code pattern recorded on an information recording (transmission) medium 30 such as paper and outputs an image signal. And a function module (reproduction equalization module 34, quantization module 36) for pre-processing (gain control, equalization processing) the image signal and for sampling / quantizing. Further, a function module for converting the quantized value into digital data to generate image data, and structuring the image data, and converting the structure information (header, that is, first processing information) and data (substance of the image data) It has a function module that converts the data into a predetermined data format and outputs it to an adjacent upper layer, that is, layer 2, a state module that inputs and outputs state information and control information related to processing, and the like.

From layer 1 to upper layer 2, structured (image) data in units of imaging frames is passed as service data units (1-SDU1).

Layer 2 (block data layer) has a basic role of reliably transmitting blocks and bit strings in blocks. The layer 2 defines various conditions for block transmission (that is, a block detection method, a channel bit detection method, a coded modulation / demodulation method, and the like). The intra-layer functions required for this layer 2, that is, the services to be provided, include block extraction and dot sampling point detection, provision of a plurality of recording methods (provision of binary, multi-value, multiplexing, etc.), and provision of a plurality of block patterns. Provision, provision of multiple coded modulation and demodulation schemes, detection of block relative position, notification of block detection error and work to overcome obstacles, etc. Here, the provision of the plurality of block patterns includes a block size detection function, a marker definition / detection function, correspondence of a multi-dot reading order, and the like.

This layer 2, that is, the block data layer,
The structured (image) data (1-SDU1) input from the adjacent lower layer, that is, layer 1, is input as 2-PDU1, and the structural information (2-PCI1 or first processing information) and the data entity (2-UD1) are input. Function module that recognizes and separates the data entity and converts the data entity into a conforming form of processing, and processes the data entity converted into the conforming form of processing to extract a plurality of blocks that are divided into predetermined information code units Function module (block extraction of dot detection points for each block (marker detection, pattern matching, etc.)) module 3
8, a dot detection (identification / judgment) module 40) and a function module (block ID data reproduction module 42, intra-block data reproduction module 4) that processes the extracted blocks and reproduces an information code in block units.
4). Here, the information code in block units includes structured information for connecting a plurality of blocks, coded modulation information, and a data entity. Further, this layer 2 reads the coded modulation information from the information in block units,
A functional module for demodulating the data entity in accordance with the encoded modulation information (encoded demodulation module 46), structured information of the demodulated blocked information code (block header, ie, second processing information) and data entity (user data)
And a function module for inputting and outputting status information and control information relating to processing, and the like.

That is, in this layer 2, for each block data, which is the first predetermined unit, a dot detection point, that is, a marker is detected from the image data in block units, and data dots are detected in block units according to the detected marker. , Returning to the bit string data. Details of this processing are described in Japanese Patent Application No. 5-260464 filed by the present applicant. Then, with respect to this data in block units, the header, that is, the block ID data is reproduced first, and then the data in the block as user data is reproduced. It is passed to the upper layer, that is, layer 3.

Layer 3 (data link layer) has a basic role of generating a predetermined data chunk (subset element (fourth predetermined unit)) in which a predetermined error quality is guaranteed and guaranteeing reliable transmission. And This layer 3
Conditions for linking block data (first predetermined unit) and various conditions for generating macroblock (third predetermined unit) / super macroblock (second predetermined unit) (that is, interleave method / structure) ),(Supermarket)
It defines macro block header & user data error control (that is, ECC method and structure). This layer 3
The functions required in the layer, that is, the services to be provided, include a function of recovering from a block address read / write error, confirmation of a read state of a desired block (check of a valid read block), setting of a block array structure, an intermediate data block Generation, provision of multiple interleaving methods / ranges / structures, EC
There are a plurality of C methods / ranges / structures.

This layer 3, ie, the data link layer, inputs the blocked information code (2-SDU1) input from the adjacent lower layer, ie, layer 2, as 3-PDU1, and then inputs the structured information (3-PCI1, ie, the second Processing information)
A function module (block link (macro block generation) for generating (constructing) a macro block or a super macro block by concatenating a plurality of data entities (3-UD1) in block units according to the structured information. ) Module 48). That is, a bit data string is received from the layer 2 in block units, a block header as 3-PCI1 (second processing information) for a predetermined bit from the head of each block, and 3-UD1 after that.
And recognizes and separates the user data, and connects the blocks according to the information written in the block header to generate a macroblock. The macroblock generated in this way is made up of incidental information (macroblock header, ie, one of the second processing information) distributed in the macroblock, and a data entity (user data).

The layer 3 is an error correction function module (macro block header unit) for rearranging the macro block by a predetermined deinterleave and correcting the subsequent macro block header by a predetermined error correction. A deinterleave / error correction module 50) reads the structured information for generating (constructing) a super macroblock from the macroblock header, and concatenates a plurality of macroblocks according to the information to generate (construct) a super macroblock. )
Function module (macro block link (super macro block generation) module 52) and a function module (super macro block unit deinterleave module) that reads interleave information from the macro block header and deinterleaves the user data of the super macro block accordingly. 54) and reading error correction information from the macroblock header,
In accordance therewith, a function module (super macroblock unit error correction module 56) for correcting the error of the user data after the deinterleave processing, and the configuration specification information of the subset element, ie, the subset element header, are read from the macroblock header, and the above described A function module (subset element unit output processing module 58) for separating the subset element from the user data of the super macroblock after error correction, and the separated subset element unit is assigned as 3-SDU1 in the adjacent upper layer, that is, layer 4 It includes a function module that outputs, and a function module that inputs and outputs status information and control information related to processing.

That is, the layer 3 performs a multi-stage function of first linking or linking blocks to generate a macroblock and then linking it to a super macroblock. Then, after the error correction processing is completed, the subset configuration specification (third processing information) written in the macroblock header is read, and the super macroblock is separated into data of the concept of a subset element and output. That is, data is transferred to the upper layer as a 3-SDU1 in subset element units.

Layer 4 (presentation layer) has a basic role of ensuring generation of a subset. This layer 4 defines conditions for linking subset elements and generating subsets. The intra-layer functions required for this layer 4, that is, services to be provided, include selection of subset elements necessary for the target file, generation of subsets and determination of their conditions, conversion of compatible data to DOS, and the like. Here, the subset is recognizable information unit data. That is, the macro block and the super macro block include multimedia information such as sound and picture, which are each a single information unit such as information only of sound if sound and information only of picture if picture. Each data chunk divided into recognizable data chunks is called a subset.

The layer 4 or the presentation layer converts the data (3-SDU1) of the subset element input from the adjacent lower layer or the layer 3 into a 4-PDU
1 and a function module (sub-file link information reading module 60) for reading structured information (4-PCI1 or fourth processing information) therefrom, and a data entity (4) in subset element units according to the read structured information. -UD1) and a functional module (subset element link (subset generation) module 62) for generating (constructing) a subset.
Here, the data of each subset element is composed of structured information (subset element header) for generating (constituting) a subset by linking the subset elements and a user data entity.

The layer 4 reads, from the generated subset, additional information necessary for an existing or new interface with an adjacent upper layer, and performs a function module for performing interface matching, a part or all of the additional information of the subset. The data entity is stored in the adjacent upper layer, that is, 4-S
It includes a functional module that outputs as DU1 and a functional module that inputs and outputs status information and control information related to processing.

The layer 5 (application layer) has a basic role of reliably ensuring good management of file management. This layer 5 defines various conditions for performing file management (that is, file generation conditions, etc.). The intra-layer function required for the layer 5, that is, the provided service includes providing a file / subset read / write process of an application request.

The layer 5 or the application layer inputs the subset data (4-SDU1) input from the adjacent lower layer or the layer 4 as 5-PDU1, and enters the additional information (5-PCI1, ie, the fifth
Function module which reads file management information from the processing information) or the data entity (5-UD1), manages files according to the file management information, generates a file by connecting subsets or subsets, and reads out the file in file units ( A file management system module 64), which assigns a subset unit or a file unit data unit generated based on the file management to the application process;
-Includes a function module that outputs as SDU1, and a function module that inputs and outputs status information and control information related to processing.

The application process has a basic role of realizing an application using the MMP system. This application process consists of shuffling method / structure of source sample data, scrambling method / structure for encryption, data compression method / structure,
There are sound, text, and image data structures. The functions required for this application process, that is, the services to be provided, include the provision of a shuffling method for the source sample data, the provision of a scramble method, and the like. Offer,
It may include confirmation of the type of information and selection of its data structure.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention relates to the above-mentioned Japanese Patent Application No. 6-12136.
Layer 3 for realizing the hierarchical structure as described in No. 8
(Data link layer), layer 4 (presentation layer), and layer 5 (application layer).

FIG. 1 is a diagram showing the structure of layer 3.

This layer 3 includes 2
Layer service data unit No. 1 (2-SDU1)
Received as layer protocol data unit No. 1 (3-PDU1). The status signal 2-SDU2 is converted to 3-
2-SDU which is a parameter setting signal as PCI2
3 as 3-PCI3, and conversely, 3-PCI2 as 2-PCI3.
3-PCI3 is output to Layer 2 as 2-SDU3 as SDU2.

Here, the state signal is a signal indicating an error state detected in the layer 2, a signal indicating a scanning state received by the layer 2 from the layer 1, and an output state of the service data unit from the layer 2, ie, the layer 2 3 shows a start and stop signal, and the like, and the reverse direction includes a reception state signal for determining whether or not this service data unit has been received in layer 3. The parameter setting signal is a signal for reading the contents of the layer 2 parameter memory in the layer 3 or a signal for setting data in the layer 2 parameter memory.

This layer 3 includes the controller 66 and the first
And second selectors 68 and 70, first and second buffer memories 72 and 74, a block header identification unit 76, a memory controller 78, a macro block header deinterleave unit 80, a macro block header ECC unit 82, and a macro block header identification unit 84. , A header correction unit 86, a super macroblock deinterleave unit 88, a super macroblock ECC unit 90, a subset element configuration unit 92, and a parameter storage memory 94.

The controller 66 receives the state signal and the parameter setting signal from the layer 2 and the layer 4, reads out the parameters stored in the parameter storage memory 94, controls the entire layer 3, and controls the layer 3. 2 and a layer 4 to output a status signal and a parameter setting signal. Also, of the parameters read from the parameter storage memory 94, the intra-block structural parameters are transmitted to the memory controller 78 by the macro block (MB).
The header interleave length is set to the memory controller 7
8 and macroblock header deinterleave section 80
And the MB header error correction (ECC) code length to the memory controller 78, the macroblock header deinterleave unit 80, and the macroblock header ECC.
Set to the section 82.

Under the control of the controller 66, the first selector 68 selectively supplies the block user data to the second selector 70 and the block header information to the block header identification section 76 among the data of 3-PDU1.

The block header identifying section 76 identifies the contents of the information of the block header and outputs the result to the memory controller 78.

The memory controller 78 receives the above-mentioned parameters from the controller 66 and the block header identification section 76.
And the macroblock header identification unit 8
4 in accordance with the parameters (super macroblock (SMB) / interleave length and SMB / ECC code length) set from the second selector 70 and the first and second selectors.
The buffer memories 72 and 74 are controlled.

Under the control of the memory controller 78, the second selector 70 transfers only the first few bytes of the block user data from the first selector 68, that is, the data of the interleaved macroblock header to the first buffer memory 72. , And selectively supply the rest to the second buffer memory 74.

The first buffer memory 72 stores the macroblock header information under the write control of the memory controller 78, and stores the data read under the read control in the macroblock header deinterleave section 8.
0.

The second buffer memory 74 stores block user data other than those stored in the first buffer memory 72 under the write control of the memory controller 78, and stores the data read by the read control in the super macro block. It is supplied to the deinterleave section 88.

The macroblock header deinterleaver 80 deinterleaves the macroblock header information read from the first buffer memory 72 using the parameters set by the controller 66, and stores the result in the macroblock header. It is supplied to the ECC unit 82.

The macroblock header ECC unit 82 corrects the error of the deinterleaved macroblock header information using the parameters set from the controller 66 and supplies the result to the macroblock header identification unit 84. . Further, a correction status signal indicating whether or not the error has been corrected is also supplied to the macroblock header identification unit 84.

The macroblock header identification section 84 determines whether or not the error has been corrected based on the correction status signal. If the error has been corrected, the macroblock header identification section 84 identifies the macroblock header information after the error correction, and obtains the parameter obtained as a result. To the memory controller 78, the super macroblock deinterleave section 88, the super macroblock ECC
Unit 90 and subset element configuration unit 92. That is, the SMB / interleave length and the SMB / ECC code length are set in the memory controller 78 and the super macroblock deinterleave unit 88, and the SMB / ECC code length is set in the super macroblock ECC unit 90.
The C code length is set, and the subset element forming unit 92
Has a subset element (SSE) header and SS
E Set the user data size. If the error cannot be corrected, the information of the stored adjacent macroblock header is supplied to the header correction unit 86. Here, the macroblock header identification unit 84 is a buffer memory (not shown) that stores a plurality of macroblock headers.
And the new macroblock header replaces the old data.

The header correction section 86 corrects the information of the macroblock header that could not be corrected with the information of the adjacent macroblock header and corrects the data content of this macroblock header. The macro block header information is returned to the macro block header identification unit 84. If the correction could not be performed, a correction error signal as indicated by a dotted line in the figure is output to the controller 66, and the controller 66 responds to the correction error signal and states that the macroblock header could not be read. The signal is sent as a status signal (3-SDU2) to the layer 4 or later.

The super macroblock deinterleaver 88 deinterleaves the data read from the second buffer memory 74 under the read control of the memory controller 78 in accordance with the parameters set by the macroblock header identifier 84. A super macro block is formed and supplied to the super macro block ECC unit 90.

The super macro block ECC unit 90
The super macroblock is error-corrected according to the parameters set by the macroblock header identification unit 84, and the result is supplied to the subset element configuration unit 92. If the error cannot be corrected, a correction error signal as indicated by a dotted line in FIG.
In response to the correction error signal, the state signal (3-SDU) indicates that the super macroblock could not be read.
2) Send to layer 4 or later.

Using the parameters set by the macroblock header identification unit 84, the subset element construction unit 92 constructs a subset element from the data of the error-corrected super macroblock, and sets the subset element as 3-SDU1. It is sent to the upper layer 4 in element units.

Here, the block data (3-PDU1) passed from the layer 2 is, as shown in FIG.
A set standard identification code 96, a user data format type 98, a block address 100, a block user data size (the number of data in a block) 102, and a block user data 104, among which the set standard identification code 96 and the user data format type 98 , Block address 100, and block user data size 102 as the block header,
This is provided to the block header identification unit 76 via the selector 68.

The set standard identification code 96 is a code representing parameters such as a dot size and a block size, as described in detail in Japanese Patent Application No. 6-173966 filed by the present applicant. That is, these parameters required for the process for decoding the contents of the dot code data performed in the upper layer are stored in a predetermined memory (for example, the parameter storage memory 94) by referring to this code.
It is intended to be able to be quoted from. For example,
If the set standard identification code 96 is "00", a certain parameter is set in layer 1, a parameter required in layer 2 is set in layer 2, and a parameter required in layer 3 is set in layer 3. , Layer 4 sets parameters required for layer 4, and layer 5 sets parameters required for layer 5, and so on.
.., Layer 5, etc., and the parameters input to each layer change for each layer. This set standard identification code 96 corresponds to the above-mentioned Japanese Patent Application No.
As described in detail in Japanese Patent No. 66, it is set by reading a system control file (SCF) recorded on an information recording (transmission) medium 30 such as paper on which the dot code 10 is recorded.

The set standard identification code is sent from the block header identification section 76 to the controller 66, and the parameters necessary for the layer 3 are stored in the parameter storage memory 94.
Used to get more.

User data format type 98
Represents an item of a parameter described below. That is, by describing the user data format type 98, it is possible to omit all the contents of those parameters. For example, when the user data format type 98 is a code “01”, a block address 100 and a block user data size 102 are added to the user data and sent. 100, the block user data size 102, and another data are added to the user data and transmitted.
Then, the type and arrangement of 3-PCI1 information are selected and recognized.

As described above, by adding the block address 100 and the block user data size 102, the layer 3 recognizes the information, and the code information having the different block data size is transferred from the layer 2. But we can recognize the difference,
Processing can be performed.

FIG. 11B is a diagram showing a block data structure in the case where the user data format type 98 is, for example, a code "02".
In this case, the block header includes the set standard identification code 96, the user data format type 98,
In addition to the block address 100 and the block user data size 102, a block address error status flag (with / without block address compensation) 106 is included.

FIG. 9C is a diagram showing a block data structure in the case where the user data format type 98 is, for example, a code "03". In this case, the block header includes the set standard identification code 96, the user data format type 98, the block address 100, the block user data size 102, the block address error status flag 106, and the number 108 of block user data demodulation errors. including.

FIG. 9D is a diagram showing a block data structure in the case where the user data format type 98 is, for example, a code "04". In this case, in addition to the set standard identification code 96, the user data format type 98, the block address 100, the block user data size 102, and the block address error status flag 106, the block header includes a block user data demodulation error position 110. including.

Here, the block address error state flag 106 indicates four states as shown in FIG. That is, when the block address is error-corrected in the layer 2, “1” indicates that the block address has no error, “2” indicates that the error has been corrected, and “2” indicates that the error was not corrected or corrected. In this case, the value "3" is used when the correction is made by the adjacent block, and the value "4" is used when the error correction or correction is not possible and the correction from the adjacent block is also failed.

This block address error state flag 1
06, the memory controller 78 determines the priority when the same block is sent a plurality of times, and
In addition, control of data writing (overwriting) to the second buffer memories 72 and 74 can be performed. That is, a block having a smaller flag value is preferentially replaced.

Further, the memory controller 78 generates the MB header / erasure position information and the SMB / erasure position information as shown in FIG. 82 and super macroblock ECC unit 90
Can also be given to That is, if the block address error state flag 106 is “4”, that is, if the address of the data of the block cannot be read, all the data of the block will be lost. Therefore, the memory controller 78 determines which block is dropped using the block address 100 of the block, determines the erasure position in the header of the macro block and the erasure position of the super macroblock, and respectively determines the MB header. Erasure position information and SMB Erasure position information is given to the macroblock header ECC unit 82 and the super macroblock ECC unit 90.

The error correction requires two pieces of information, ie, error position information and error pattern information for correcting the error at that position. Of the two pieces of information, the former information is used as the erasure position information and the ECC unit 82, 90. As will be described later, the error correction check symbol given to the corresponding ECC part as a part of the macroblock header or the super macroblock can be used only for the latter information. Double error pattern information can be provided. As a result, when all error positions are known, the error correction capabilities of the ECC units 82 and 90 can be almost doubled.

As information for generating the erasure information, the block user data demodulation error position 11
0 can also be used. That is, since it is possible to know where in the block the demodulation error has occurred, the memory controller 78 determines where in the macroblock header the erasure has occurred, or where in the super macroblock. Information on whether the disappearance has occurred can be easily obtained.

The number of block user data demodulation errors 108 refers to the data of the same block duplicately transferred at the time of linking the blocks in Layer 3, that is, the block of the same address has been transferred several times. In this case, if the number of demodulation errors 108 is sent from the layer 2, the number of demodulation errors up to the previous time is compared with the current number of demodulation errors, and block data having a small number of errors are selected and reconstructed. The reason is that the error rate of the data can be reduced, the error can be corrected at high speed, and the frequency of error correction can be reduced.

Next, the structure of the macroblock header obtained as a result of the deinterleave processing by the macroblock header deinterleaver 80 will be described.

That is, as shown in FIG. 8A, the macro block header includes a set standard identification code 112, a user data format type 114, macro block connection information 116 for linking macro blocks, SMB interleave method information 118, which is information on how to interleave macroblocks, SMB error correction method information 120, which is information indicating an error correction method for super macroblocks, and error detection method for super macroblocks. SMB error detection method information 122 that is information indicating, subset element link information 124 that is information for linking subsets, subset element user data size 126, error detection check symbol 128, and error correction check symbol 1 0 consists of.

The error detection check symbol 128 is obtained by arranging the set standard identification code 112 to the subset element user data size 126 as one-dimensional data.
This is for detecting whether an error has occurred in the one-dimensional data.

In practice, this macroblock header is
It has a two-dimensional structure as shown in FIG. The error correction is performed in the vertical direction in the figure such that there is an error correction check symbol for data in a certain vertical column, as indicated by the MB error correction code length in the figure. By performing the interleaving of the two-dimensional structure in this way, it becomes strong against a burst error.

Further, a horizontal error correction check symbol 132 as shown in FIG. Alternatively, error correction may be performed in an oblique direction.

FIGS. 9A to 9C show the case of FIG.
It is a figure which shows the more specific example of (C).

That is, SMB interleave method information 11
8 is the SMB interleave length 118 ′, and the SMB error correction method information 120 is the SMB error correction code length 12 ′.
At 0 ′, the SMB error detection method information 122 is an SMB error detection presence / absence determination flag 122 ′.

Next, the structure of a super macroblock obtained as a result of the deinterleave processing by super macroblock deinterleave section 88 will be described.

This super macroblock is determined by the information in the macroblock header, that is, the set standard identification code 112 of the macroblock header, or
What kind of error correction structure has the user data format type 114 or less information,
That is, what kind of interleaving is performed, or
The structure of the error correction code length is determined.

FIGS. 10A and 11A show the structure of a super macroblock. As shown in these figures, the size of the super macroblock is variable, and the data size of the subset element is also variable. It is variable.

That is, FIG. 10 shows a case where a plurality of subset element data 134 exist in one super macroblock. Then, after the dummy data 136 is inserted in the remaining portion, there is an error detection check symbol 138. This corresponds to, for example, the super macroblock No. In No. 1, when the subset element user data 1 to n and the dummy data are arranged one-dimensionally as data, it is for detecting whether or not an error has occurred in the one-dimensional data.
After the error detection check symbol 138 is attached, an error correction check symbol 140 is attached vertically. Therefore, in the case of decoding, on the contrary, first, the error correction check symbol 140 is first viewed, the error correction is decoded, the error is corrected, and then the error is detected. The check symbol 138 is used to check if there is an error in this.

The super macro block No. 2 also
Super macro block No. 1, super macroblock No. Assuming that 1 includes n pieces of subset element data 134, the structure is such that n pieces of subset element data 134 are sequentially entered from the subset element user data n + 1.

FIG. 11A shows two super macro blocks and one subset element 134.
(Each super macro block includes half 134-1 and 134-2 of the subset element). Further, this figure shows a case where the size of the super macroblock is smaller than that of the example of FIG.

Of course, one sub-macro block may constitute one subset element user data.

Also, as shown in FIGS. 12A and 12B, this super macroblock has a horizontal error correction check symbol 14 similar to the macroblock header.
2 may be further added. Alternatively, error correction may be performed in an oblique direction.

Next, the structure of the subset element constituted by the subset element forming unit 92 of FIG. 1 will be described.

The subset element is, for example, as shown in FIG.
(B), the set standard identification code 144,
Following the user data format type 146, the subset element connection information 148 and the subset element user data size 150 are entered, followed by the subset element user data 152. Such a subset element is passed to Layer 4 as 3-SDU1. Of course, this is only an example, and may be appropriately changed depending on what information is required in a higher hierarchy.

The layer 3 (controller 66)
Between layer 4 and layer 4, 3-SDU2 which is a status signal (4-PCI2 when viewed from the layer 4 side) and 3-SDU3 which is a parameter setting signal (4-P2 when viewed from the layer 4 side)
CI3) is exchanged. Here, the status signal is a signal indicating a status in which the correction by the header correction unit 86 could not be performed, a status in which the error could not be corrected in the super macroblock ECC unit 90, or the like. It includes a status signal indicating that the subset element has been transmitted as a unit, or a reception status signal for determining whether or not the subset element has been received at layer 4 in the reverse direction. The parameter setting signal is a signal for setting data in the parameter storage memory 94 from the upper layer and reading the contents of the parameter storage memory 92 in the upper layer.

Next, the operation of layer 3 in such a configuration will be described with reference to the flowchart of FIG.

First, in order to start the layer 3 from the layer 2, the start signal is 2-SDU2 (3-PCI2).
At the time of input as 2-SDU3 (3-PCI3
) To the parameter setting signal or 2-SDU1 (3-P
DU1), the set standard identification code 96 is obtained, and the layer 3 is initialized (step S11). That is,
According to the parameter setting signal and the set standard identification code 96, the number of data of the macro block header distributed to each block, the method of linking the macro block headers,
Various parameters such as an error correction method of the macro block header are read from the parameter storage memory 94 and stored in the controller.

Then, input of 3-PDU1 data (block data) from layer 2 is accepted (step S12), and if block data exists (step S1).
3) The first selector 68 separates the input block data into a block header and block user data 104, and the block user data 104 is sent to the second selector 70, and the block header is sent to the block header identification unit 76. Supply (Step S14).

Here, the block header identification section 76 recognizes the block header, for example, the block address 100 and the block user data size 102, and supplies the identified data to the memory controller 78.

The memory controller 78, at the same time as the information from the block header identification unit 76, also stores the number of macroblock header data distributed to each block (in-block structure parameter) taken into the controller 66 in the initial setting, MB header interleave length, M
It receives parameters such as B header and ECC code length. Then, using the information from the block header identification unit 76 and these three parameters, switching control of the second selector 70 and storage control of the first and second buffer memories 72 and 74 are performed. Actually, the first selector 68
The first few bytes of the block user data 104, ie, only the interleaved macroblock header, are supplied to the first buffer memory 72, and the remaining data, ie, the macroblock user data, are transferred to the second buffer memory 72.
It is supplied to the buffer memory 74 (step S1
5).

In this case, the memory controller 78
As the identification information from the block header identification unit 76, a block address 100 and a block user data size 1
02 is supplied, the memory controller 78
Stores the output of the second selector 70 at the position of the first buffer memory 72 and the position of the second buffer memory 74 calculated using this (step S16). Alternatively, after writing to the buffer memories 72 and 74 once and looking at the block address error state flag 106, if the data currently sent is better than the previous data, that is, there is no error. If so, control is performed to rewrite it.

Then, the memory controller 78 determines whether or not the data of the macroblock has been formed, based on the block address 100 sent from the block header identification unit 76, that is, the data of the macroblock, that is, the header data and the user data. Is buffer memory 7
Then, it is determined whether or not it has accumulated at 2, 74 (step S17). If the data in the macro block has not been stored yet, the process returns to step S12 to repeat the above operation.

When the data of the macroblock header is accumulated in the first buffer memory 72, the data is sent to the macroblock header deinterleave unit 80. Macro block header deinterleave section 80
Is set with parameters of the MB header / interleave length and the MB header / ECC code length from the controller 66. According to these parameters, the data supplied from the first buffer memory 72 is deinterleaved and deinterleaved. The data of the obtained macroblock header is supplied to the macroblock header ECC unit 82.

In the macroblock header ECC unit 82, the MB header / ECC code length from the controller 66, and in the example of FIG. 7, the MB header / erasure position information from the memory controller 78 are set as parameters. The error correction is performed on the interleaved macroblock header (step S18). Then, the data after the error correction is supplied to a macroblock header identification unit 84 for identifying a macroblock header. Also, as indicated by a dotted line in FIG. 1 or FIG. 7, a correction status signal indicating whether or not the error has been corrected is also supplied to the macroblock header identification unit 84.

The macroblock header identifying section 84 first determines whether or not the error correction of the macroblock header has been completely performed based on the correction state signal (step S19). If the error cannot be corrected,
It is determined whether or not there is an error in the previous macroblock header that has been processed earlier (step S
20) If there is an error there, the error processing is performed (step S21), and the process returns to step S12 to process the next block data. If the error of the first macroblock header could not be corrected, there is no previous macroblock header, but in this case, the previous block header is treated as having an error. It shall be.

If the error cannot be corrected but the previous macroblock header has no error, the macroblock header identification section 84 sends the macroblock header whose error cannot be corrected to the header correction section 86. The header data is supplied, and the macroblock header is corrected (step S22). That is, the header correction unit 86
Corrects the data content of the macroblock header with the information of the previous macroblock header. Then, it is determined whether or not the correction has been performed by the correction processing (step S2).
3) If the correction could not be made, the above step S21
Proceed to error processing of.

The error processing in step S21 is basically performed when an error occurs in two macroblock headers, that is, when the result of step S20 is NO, the error is detected at that point. Cannot be corrected from the adjacent macroblock header, so that processing such as forcibly terminating the processing may be performed. If the header correction unit 86 cannot correct the macroblock header, that is, N
When it becomes O, a correction error signal as shown by a dotted line in FIG. 1 or FIG.
In response to the correction error signal, the controller 66 performs error processing such that a signal indicating that the macroblock header could not be read is transmitted as a status signal (3-SDU2) to the layer 4 or later.

When the data can be corrected by the header correction section 86, the corrected macro block header data is returned to the macro block header identification section 84.

On the other hand, if the macroblock header has been error-corrected (step S19), the macroblock identifying section 84 checks whether or not there is an error in the previous macroblock header (step S24). If there is an error in the previous macroblock header, the process proceeds to step S22, where the header correction unit 86 uses the macroblock header in which the error has been corrected, and uses the macroblock header in which the previous error could not be corrected. Correct the header.

If the macroblock header can be corrected in this way, or if the error can be corrected and there is no error in the previous macroblock header, the macroblock header identification unit 84 determines whether the information in the macroblock header is correct. And obtains a super macroblock configuration parameter and a subset element configuration parameter (step S25). Then, those parameters are stored in memory controller 78, super macroblock deinterleave section 88, super macroblock ECC section 9
0, and set in the subset element configuration unit 92. That is, the SMB interleave length and the SMB ECC code length are set in the memory controller 78 and the super macroblock deinterleave unit 88, and the SMB ECC unit is set in the super macroblock ECC unit 90.
The code length is set, and the SSE header and the SSE user data size are set in the subset element configuration unit 92.

In this way, the memory controller 78
When the interleave length and the SMB / ECC code length are set, since the two parameters define the size of the super macroblock, the memory controller 78 calculates them and the second buffer memory It is determined whether or not the size of the data is included in 74, that is, whether or not a super macroblock can be formed by the input macroblock user data (step S26). If not, the process returns to step S12 and returns to step S12. Repeat the process.

When data of the size of the data of the super macro block is sufficiently stored in the second buffer memory 74, the data is inputted from the second buffer memory 74 to the super macro block deinterleave section 88, and Super macroblock deinterleave section 8
8, a super macroblock is formed by deinterleaving the macroblock user data (step S2).
7), and supply it to the super macroblock ECC unit 90.

The super macro block ECC unit 90
SMB / ECC from macro block header identification unit 84
The code length and the SMB header / erasure position information from the memory controller 78 in the example of FIG. 7 are set as parameters, and the deinterleaved super macroblock is error-corrected according to the parameters (step S28).

After the error correction of the super macro block, if there is an error in the error (step S29), error processing is performed (step S30). For example, a signal indicating that an error has occurred as indicated by a dotted line in FIG. 1 or FIG. 7 is input to the controller 66, and this state is sent to the layer 4 or the layer 2. If there is no error (step S2
9), this data is supplied to the subset element configuration unit 92 as the subset element user data 152.

The subset element structuring unit 92 includes the SSE header from the macroblock header identifying unit 84 and the SSE header.
The SE user data size 150 is set as a parameter, and according to these, it is checked whether the subset element user data is provided as necessary, that is, whether the subset element can be configured (step S31). S2
Returning to step 6, the above processing is repeated.

Also, as many subset element user data 152 as necessary are stored in the super macroblock ECC.
When input from the unit 90, the SSE header and the SSE user data size 150 from the macroblock header identification unit 84 are added to the subset element user data 152 to form a subset element. Is output to layer 4 (step S32).

In the above description, a macro block is formed by linking blocks, and a super macro block is formed by linking the macro blocks. However, a super macro block is formed without passing through a macro block. Blocks can also be configured.

Next, the layers 4 and 5 will be described in detail.

The layer 4 links the subset elements from the layer 3 to generate a subset, and passes the subset to the layer 5. Layer 5 is
It is mainly a file management system that passes data to application processes in subset units. Hereinafter, a case where, for example, MS-DOS (trademark of Microsoft Corporation in the United States) is adopted as a file management system for this layer 5 will be described.

When managing the MMP playback device 28, that is, up to layer 3 on a DOS basis, the DOS
The P playback device 28 can be regarded as a block-type device or a character-type device.

First, the case where the MMP reproducing device 28 is regarded as a block type device will be described.

FIG. 14A is a diagram showing a configuration example of 4-PDU1 (subset element data) output from the layer 3 and input to the layer 4, wherein the assigned subset ID number 154 as 4-PCI1 and the subset It comprises a generation standard ID number 156, the number of subset elements 158 constituting a subset, a subset generation structure identifier 160, and user data (subset element user data 152) 162 as 4-UD1. This is different from the configuration example shown in FIG. 11B, but of course includes the above-mentioned set standard identification code 144, user data format type 146, subset element connection information 148, subset element user data size 150, and the like. May be.

The subset ID number 154 is a number indicating which subset member this subset element data is because the subset elements are linked in the layer 4 to form a subset. Here, the subset is the recognizable information unit data as described above. That is, the macro block and the super macro block include multimedia information such as sound and picture.
In the case of a picture, each piece of data divided into pieces of data that can be recognized as one information unit, such as information of a picture alone, is called a subset.

The subset generation reference standard ID number 156 is information indicating a reference at which level a subset is considered to be completed. That is, if it is assumed that a subset cannot be formed unless all the subset elements are collected, it is impossible to proceed to the next process if a certain subset element does not enter from layer 3 due to some error. Therefore, even in such a case, proceed with the next processing, that is, even if the quality is slightly worse,
It may be sent to the application and played back. For example, a generation criterion that a subset can be formed if 90% of the generated subset elements are complete is provided. A plurality of such generation standards are provided, and the number indicating which one is selected is the subset generation standard ID number 156.

The subset element number 158 constituting the subset is information indicating how many subset elements constitute the subset.

The subset generation structure identifier 160 is information for identifying a plurality of methods for linking subsets, when there are multiple methods.

FIGS. 14B and 14C are diagrams showing the structure of the subset constituted by the layer 4. FIG. Here, a file is composed of several subsets. A subset located at the head of the file (hereinafter referred to as a head subset) and a subset located at other positions (hereinafter referred to as a general subset) )
And have different structures.

As shown in (B) of the figure, the leading subset is a subset standard name identifier 164 as a subset header, an MMP file type 166, a subset ID number 168, a subset link information 170, a belonging file ID number 172, Page number 174, In-page position 176, File name 178, File structure type 1
80, DOS file type 182, DOS file attribute 184, book name 186, and book ID number 188
And user data format type (UFT)
190, a subset data control header (SDCH) 192, and user data 194.

As shown in (C) of the figure, the general subset is a subset standard name identifier 164 as a subset header, an MMP file type 166, a subset ID number 168, a subset link information 17
0, belonging file ID number 172, page number 174,
In-page position 176, book ID number 188, and user data format type (UFT) 190
And a subset data control header (SDC
H) 192 and user data 194.

The subset data control header (SDCH) 192 is used for restoring sound data for sound, image data for image, text data for text, or data in which both are mixed into recognizable information. Is a control header. For example, it specifies a compression method and the like.

The subset header is information necessary only for managing the subset.
It contains various parameter information that the DOS may seek. Note that these parameters merely enumerate those that may be useful in the application, and not all of them are necessary. Also, the order is not limited to this.

That is, the subset standard name identifier 164
May be the set standard identification code itself,
It may include that.

The MMP file type 166 is as follows. That is, as described later, there are two types of files, an index file and a general file.
The index file corresponds to a table of contents. For example, when the transmission medium 30 is provided in the form of a book of a plurality of pages, that is, a book, what page of the book is arranged at the very beginning of the book. Is a file that contains a list of what files exist.
In a normal block type device, that is, a disk such as a floppy (registered trademark) disk or a hard disk, a prescribed file directory entry and a FAT (File Allocation Table) are included in the disk. Information such as a table of contents such as a file name, a first sector or a cluster number of the file name is written. Therefore,
In order to treat the MMP playback device 28 as a block-type device equivalent to such a disk, it is necessary to prepare a file corresponding to the file directory entry and the FAT as an index file. MM
The P file type 166 is information used to distinguish whether the file is such an index file or a general file.

The subset ID number 168 is the ID number of the subset, and the subset link information 170 is information used when linking the subset to create a file. The belonging file ID number 172 is information indicating which file is a member of the subset.
The page number 174 and the in-page position 176 are information indicating on which page of the book the subset itself is located. The file name 178 is information indicating the name of the file.

The file structure type 180 is information indicating whether the file is a single file or a subset link structure type file. This is whether the first subset is one file,
That is, it indicates whether the file is a single file or, instead, the file is formed of several subsets.

The DOS file type 182 indicates the type of a file determined by DOS, and is generally called an extension. Therefore, this may be included in the file name 178. In addition, the DOS file attribute 184 is also used for read-only files and hidden files.
It indicates an attribute determined by the OS.

Book name 186 and book ID number 188
If the MMP code is in the book format,
The name of the book and an ID number for specifying the book.

The user data format type (UFT) 190 is for identifying the structure itself of the subset data control header (SDCH) 192 and the parameters set therein. That is, as described above, for example, if the subset is an audio subset, parameters such as a compression scheme, parameters related to the compression scheme, a sampling frequency, quantization, and the like are set. The information for selecting one of the UFT1
90.

FIGS. 15A to 15C are diagrams showing various usages of the subset standard name identifier 164. FIG.

FIG. 14A shows a general structure, and this subset is a subset standard name identifier 16.
4 and a subset header 196 containing the various information described above.
And user data format type (UFT)
190, a subset data control header (SDCH) 192, and user data 194.

[0138] Also, (B) of the figure shows a subset standard identifier 164, for example, "001".
Since the contents of the header 196 are known, the case where it is omitted is shown. However, the subset data control header (SDCH) 192 and the user data 194
Is the user data format type (UFT)
By looking at 190, it is possible to identify for the first time what the structure of this structure or parameter is, so UFT 190
Is left.

FIG. 17C shows a case in which the contents of the subset header 196 are omitted from the subset standard name identifier 164, for example, "002", so that the contents thereof can be known. However, the subset data control header (SDCH) 192 and the user data 194 are a user data format type (UFT) 190
, It is possible to identify for the first time what the structure of this structure or parameter is, so the UFT 190 is left. Then, this UFT 190 allows the SDCH
Since the structure of 192 or the structure of the parameter is known,
This SDCH 192 is omitted.

FIGS. 16A and 16B are diagrams showing the structure of a general file and an index file when a file is constructed by linking subsets.

That is, the general file has a structure in which a head subset as described above is first arranged and then a plurality of general subsets are connected, as shown in FIG.

On the other hand, in the case of an index file, it is composed of one subset, and the subset header is the same as the head subset, but the contents of the user data are shown in FIG. Thus, an index 198 corresponding to a so-called file directory entry and FAT is written. The index 198 indicates a corresponding file.
Of course, this index file may also be constructed by linking some subsets.

FIG. 17 is a diagram showing the relationship between subset elements, subsets, and files. In the figure, SSECI indicates subset element configuration information,
SSE-H <An> indicates the nth subset element header of subset A, SSE-UD <An> indicates the nth subset element user data of subset A, and SS-H <A> indicates the subset data of subset A. A header indicates SS-UD <A>, subset user data of subset A, ACH indicates an application control header, and AP-UD <A> indicates application user data A.

That is, the subset elements in the super macroblock from layer 3 are combined in layer 4 to generate a subset. This subset is linked into one file. At that time, the subset basically has a subset header and a subset data control header, and is configured to have the subset user data. Therefore, there is no need to know the contents of the subset user data. The control header contains information indicating the type of media that is necessary for management, such as whether the information is sound or picture.
In the case of handling by DOS, it is not necessary to look at the subset data control header and the subset user data, and the file management may be performed using only the subset header as a key. When the file format finally handled by the application process is reached, the subset headers or subset data control headers of the subsets A, B, C, and D are collected and linked to form one application control.・ Header is created. Alternatively, a specific subset header or a specific subset of user data itself is
It may be one application control header.

The application control header indicates what media the individual user data is and what must be done to decompress or recognize the media. Contains information. In addition to this, for example, what kind of space is used for the application user data A, B, C, and D, for example, if the application user data A, B, C, and D are not arranged and sound is generated, this image can be operated in this way. The sound is inevitably output at the same time, the arrangement of data corresponding to each individual subset,
It is structured in relations and describes information such as whether it exists when viewed from an application point of view.

Next, the configuration of the layers 4 and 5 when the MMP playback device 28 is actually viewed as a block type device will be described with reference to the functional block diagram of FIG.

That is, the layer 4 includes the error processing section 200A
, A processing parameter storage memory 202, a subset generation unit 204, a file type identification unit 206, a necessary parameter extraction / analysis unit 208 in an index file, a logical sector number / MMP file recording position conversion table generation / selection unit 210, DOS format data matching processing section 212, command analysis section 21
4, a logical sector number analysis unit 216 and a corresponding read file read request unit 218. Among them, for example, the file type identification unit 206 to the corresponding read file read request unit 218 are the device driver MMP. SY
Provided as S. That is, this MMP. SYS performs only read / write on a sector basis and stores data in a memory location specified by DOS.

[0148] The layer 5 includes the MSDOS.MS file as a file management system. SYS220 and its MSDO
S. MSD as main memory location specified by SYS
OS. And a SYS management read buffer 222.

The layer 5 MSDOS. SYS220 is
Prints a request to read a file. For example, a command packet for reading a file having a file name “XXXXXXXX.MMP” is output.

The command analysis unit 214 of the layer 4 outputs the MSDOS. The contents of the command packet output from the SYS 220 are analyzed, and if it is a read command,
The logical sector number included in the command packet is provided to the logical sector number analysis unit 216.

That is, MSDOS. The SYS 220 basically specifies only the sector number of the disk, that is, only issues a command to read the number of the sector. Therefore, the logical sector number analysis unit 216 uses this MS.
DOS. The logical sector number from the SYS 220 is interpreted. When reading a file, MSDOS. SYS220
Indicates that at first, the file directory entry and the FAT, that is, the index-like part whose format is defined by DOS, are to be read. Since the sector number of this file directory entry is predetermined, for example, number 1, the sector number is MSDOS. The SYS 220 outputs the sector number as a command packet together with the read command. The logical sector number analysis unit 216 determines that the sector number corresponding to this file directory entry is MS
DOS. When instructed by the SYS 220, the corresponding read file read quest unit 218 is instructed to read the corresponding position in the page.

The corresponding read file read quest section 218
Indicates to the user, by display or sound, which page of the book and which side of the book should be read, that is, where the page should be scanned.

Then, the data is obtained as 3-SDU1 using the service function of layer 3 or lower, and the data is obtained as 4-SDU1.
The data is input to the subset generation unit 204 as PDU1. Further, the controller 200 outputs the status signal 3-SDU2 to 4
-Receive as PDU2, and control the subset generation unit 204 according to the function execution start / end control signal therein.

When instructed by the controller 200 to start function execution, the subset generation unit 204 uses parameters such as a subset standard name identifier and a subset element / header structure stored in the processing parameter storage memory 202. Generate a subset from the subset elements from layer 3. Then, the generated subset is supplied to the file type identification unit 206.

The file type identification section 206 is a subset of the subset generated by the subset generation section 204.
The header 196 is interpreted, and it is determined from the MMP file type 166 therein whether the subset is a part of the index file or a part of the general file. Also,
The file type of the MMP, that is, the information of whether the file is an index file or a general file is set as a parameter from the logical sector number analysis unit 216 in the file identification unit 206, and the file type identification unit 206 The MMP file type set from the logical sector number analysis unit 216 is compared with the MMP file type interpreted from the subset header 196. If the two are different, the controller 20
0 causes the internal error processing unit 200A to perform necessary error processing.

For example, as described above, MSDOS. S
If the YS 220 instructs to read the file directory entry, which corresponds to reading the index file, the MMP file type indicating that the file is an index file is set as a parameter, and the subset If the header 196 does not match when interpreted, the subsequent processing cannot be performed, so the error processing unit 200A sends an error notification to the MSDOS. This is sent to the SYS 220 to make it instruct to read the index again.

If the file is an index file as requested, the file type identifying section 206 sends the index file to the necessary parameter extracting / analyzing section 208 in the index file.

The necessary parameter extraction / analysis section 208 in the index file extracts and analyzes necessary parameters in the supplied index file. That is, from each index 198 written in the user data of the index file, the file name therein, the first page number and the position in the page of the corresponding file are extracted, and these are extracted as logical sector number / MMP file record. This is sent to the position conversion table generation / selection unit 210.

The logical sector number / MMP file recording position conversion table generation / selection section 210 generates a conversion table according to this information. That is, a list is created by appropriately assigning a certain logical sector number and comparing the file location corresponding to the logical sector number, that is, the first page number and the position in the page of the corresponding file. Further, it generates a FAT of the entered file and sets it in the conversion table.

DOS format data matching processing section 21
2 receives the contents of the index file from the necessary parameter extraction / analysis unit 208 in the index file and the FAT information from the logical sector number / MMP file recording position conversion table generation / selection unit 210, and converts it into a DOS format. Consistent with the data format, that is, the format of the file directory entry, 4
-Layer 5 MSDOS. SYS management read buffer 222, that is, MSDOS. The data is written into the management buffer memory of the SYS 220.

Thus, MSDOS. SYS220
This MSDOS. By reading data from the SYS management read buffer 222, a list of file directory entries can be known.

When it is found that there is a corresponding file name, for example, MSDOS. SYS220
Outputs the sector number there to the command analysis unit 214. The sector number in this case is logical sector number / MMP
This corresponds to the sector number determined by the file recording position conversion table generation / selection unit 210.

The logical sector number analysis unit 216 uses the logical sector number / MMP file recording position conversion table generation / selection unit 210 to determine what file and where the sector number analyzed by the command analysis unit 214 corresponds. Analyze by looking at the generated conversion table. Then, the page number and the position in the page corresponding to the sector number are given to the read file read request unit 218.
Thereby, the corresponding read file read request unit 218
Prompts the user to read what page and where.

Then, from the subset elements read by the layer 3 and lower functions, the subset generation unit 20
4 to generate a subset, and the file type identification unit 206
Identifies the file type. However, this time, since the general file must be read, it is determined whether the file type is the general file. If you read the index file, you will get an error.

If the file is a general file, the data is sent to the DOS format data matching processing section 212 in subset units, matched with the data in the DOS format, and the MSDOS. Written in the SYS management read buffer 222.

FIGS. 19 and 20 are a series of flowcharts showing the operation in such a configuration.

That is, first, MSDOS. SYS220 is a device driver MMP. SYS is opened (step S41), and a command packet is output as described above (step S42). That is, here, the read instruction,
The number of sectors that can be read is MSDOS. SYS220
The packet is output after setting.

The MMP. In SYS, the command is first analyzed by the command analysis unit 214 (step S4).
3) It is determined whether or not it is a read command (step S44). If not, the process of this flowchart ends, that is, the process proceeds to another process such as a write process.

If it is a read command, then
The logical sector number analysis unit 216 analyzes the logical sector number (step S45), and determines whether the result of the analysis is a logical sector number corresponding to the directory entry (step S46).

In such a case, since the file corresponding to the logical sector number is an index file as described above, this index file is read, but before that, First, the MMP file type notification, that is, the fact that the MMP file = index file is output to the file type identification unit 206 (step S47). And
It requests the corresponding file read request unit 218 to read the corresponding file (step S48).

Thus, the corresponding file read request unit 218 instructs the user that the corresponding file, that is, which page of the book and which side of the book can be read by the scanner (not shown). In accordance with this instruction, the user scans the index file with the scanner, executes the reading process of the index file using the function of the layer 3 or lower, and as a result, the subset is generated by the subset generating unit 204 ( Step S49).

This subset is the MMP. When input to the SYS file type identification unit 206 (step S5)
0), the file type identification unit 206 identifies the file type of this subset (step S51), and since the MMP file = index file from the logical sector number analysis unit 216 is set, the identified file type is It is determined whether the file is an index file (step S52). If the file is not an index file, the above-described step S
Returning to 48, the read request for the file is repeated again.

If the file is an index file, the file type identification unit 206 acquires the data structure information of the index file from the processing parameter storage memory 20 (step S53). In other words, in order to read or interpret the index file, the data structure information registered in the processing parameter storage memory 202 is read in what structure the index file is written. Then, the index file and the read data structure information are sent to the necessary parameter extraction / analysis unit 208 in the index file.

The necessary parameter extraction / analysis unit 208 in the index file uses this data structure information to
Interpret the index file,
From the file, necessary parameters, for example, information such as the page number and the position in the page of the entered file are extracted and sent to the logical sector number / MMP file recording position conversion table generation / selection unit 210 (step S).
54).

The logical sector number / MMP file recording position conversion table generation / selection section 210 sets the page number and the position in the page of the file entered in the target table logical sector number / MMP file recording position conversion table. Step S55). That is, there is a table in which the logical sector numbers are listed in advance, and the information of the page number and the position in the page corresponding to the logical sector number is filled in the table area provided corresponding to the logical sector number.

The logical sector number / MMP file recording position conversion table generation / selection section 210 generates the FAT of the file entered and sets it in the logical sector / MMP file conversion table (step S56). . The reason for setting such a FAT in the table is as follows. That is, the number of bytes of a sector is predetermined, and the MSDOS. The SYS 220 manages it. MSDOS. When instructing from the SYS 220, the sector number corresponding to the cluster number is instructed. Therefore, when reading the MMP file, it is necessary to divide the file into its size. For example, if there is a subset of data for multiple clusters, this is the MSD
OS. Cluster numbers must be given so that the breaks can be managed by the SYS 220. At that moment,
Since the information of the connection of each cluster, that is, the information to which cluster can be jumped next is written in the FAT, the FAT
If the conversion table of MSDOS. Is not prepared, MSDOS. SYS22
It cannot be notified to the 0 side.

DOS format data matching processing section 21
2 receives information on the contents of the index file from the necessary parameter extraction / analysis unit 208 in the index file, and obtains the logical sector number and the like set from the logical sector number / MMP file recording position conversion table generation / selection unit 210 Then, a directory entry according to the DOS rules of the read file is generated and discharged (step S57).

The discharged directory entry is stored in the MSDOS. SYS220-designated read buffer memory, ie, MSDOS. The data is written to the SYS management read buffer 222 (step S58).

MSDOS. The SYS 220 obtains and interprets the directory entry from the buffer 222, sets a sector number corresponding to the head cluster number of the requested file and a read command in the command packet (step S59), and returns to step S42.
Output the command packet. That is, MSDOS.
SYS 220 obtains the contents of the directory entry and retrieves the MSDOS. It is interpreted in the SYS 220, and it is determined where to read next, and the corresponding sector number is output.

By repeating such processing, all directory entries are obtained.

Next, the MSDOS. When the SYS220 interprets the file and finds a certain target file, the MSDOS. SYS220
Outputs the logical sector number of the file by a command packet. In this case, in step S46, it is determined that the logical sector number does not correspond to the directory entry, and the process proceeds to step S60.

The logical sector number analysis unit 216 refers to the conversion table generated by the logical sector number / MMP file recording position conversion table generation / selection unit 210,
SDOS. It is checked whether the logical sector number requested from the SYS 220 is the logical sector number corresponding to the last cluster number of the file (step S60).
If it is not the last logical sector number, an MMP file type notification, that is, MMP file = general file is output to the file type identification unit 206 (step S61). Next, by referring to the conversion table generated by the logical sector number / MMP file recording position conversion table generation / selection section 210, the reading position of the corresponding MMP file is obtained (step S6).
2) Request the corresponding file read request unit 218 to read the relevant file (step S63).

The corresponding file read request unit 218
It is determined whether or not the requested read position of the file is a position corresponding to the already read subset (step S64). This is for the following reason. That is, in the case of a general disk, it is necessary to alternately repeat one reading of the target sector and the instruction of the target sector by the DOS. On the other hand, in the present embodiment, since the sector to be discharged to the layer 5 is smaller than the subset, the subset is once read out collectively,
The process of discharging in sector units is performed. Therefore, MSDOS. Since there is a possibility that the sector specified by the SYS 220 may already be included in the already read subset, it is checked here. if,
If the subset has already been read, the process proceeds to step S71 described later.

On the other hand, if it corresponds to the subset that has not been read yet, the corresponding file read request unit 218
Indicates to the user that the corresponding file, that is, which page of the book and which side of the book can be read by a scanner (not shown). In accordance with this instruction, the user scans the file with the scanner, executes the file reading process using the function of the layer 3 or lower, and as a result, the subset generation unit 204 generates the subset (step S).
65).

This subset is the MMP. When input to the SYS file type identification unit 206 (step S6)
6) The file type identification unit 206 identifies the file type of this subset (step S67), and stores the data structure information of the file in the processing parameter storage memory 20.
2 (step S68), and interpret the contents of the subset. As a result, it can be determined whether the file is an index file or a general file. Therefore, M from the logical sector number analysis unit 216
Since MP file = general file is set,
If the identified file type is not a general file (step S69), the process returns to step S63, and again
Repeat the read request for the file.

If the file is a general file, the subset is sent to the DOS format matching section 212 (step S70).

In the DOS format matching unit 212, the logical sector number / MMP file recording position conversion table generation / selection unit 210 converts the FA of the conversion table generated.
Referring to the T information, the sector number to be read next is set in the command packet (step S71), and the data of the read sector is stored in the MSDOS. Writing to the SYS management read buffer 222 (step S72).
That is, data is ejected in a data format according to the DOS rules, that is, in units of sectors.
The next sector number that must be read is MSDOS. S
In order to teach the YS 220, a sector number to be read next is set in the command packet, and writing to the buffer 222 is started.

Thereafter, the flow returns to step S42 to repeat the above processing.

Then, MSDOS. When the logical sector number requested from the SYS 220 becomes the logical sector number corresponding to the last cluster number of the file (step S60), the process proceeds to step S73.

That is, the logical sector number analysis unit 216 outputs an MMP file type notification to the file type identification unit 206, that is, that MMP file = general file (step S73). Next, by referring to the conversion table generated by the logical sector number / MMP file recording position conversion table generation / selection section 210, the reading position of the corresponding MMP file is obtained (step S7).
4) Request the corresponding file read request unit 218 to read the corresponding file (step S75).

The corresponding file read request section 218
It is determined whether the requested read position of the file is a position corresponding to the already read subset (step S76). If the read position is the already read subset, the process proceeds to step S83 described later.

On the other hand, if it corresponds to the subset that has not been read yet, the corresponding file read request unit 218
Indicates to the user that the corresponding file, that is, which page of the book and which side of the book can be read by a scanner (not shown). In accordance with this instruction, the user scans the file with the scanner, executes the file reading process using the function of the layer 3 or lower, and as a result, the subset generation unit 204 generates the subset (step S).
77).

This subset is the MMP. When input to the SYS file type identification unit 206 (step S7)
8) The file type identification unit 206 identifies the file type of the subset (step S79), and stores the data structure information of the file in the processing parameter storage memory 20.
2 (step S80), and interpret the contents of the subset. As a result, it can be determined whether the file is an index file or a general file. Therefore, M from the logical sector number analysis unit 216
Since MP file = general file is set,
If the identified file type is not a general file (step S81), the process returns to step S75, and again
Repeat the read request for the file.

If the file is a general file, the subset is sent to the DOS format matching unit 212 (step S82).

The DOS format matching section 212 converts the read sector data into an MSDO according to the DOS rules.
S. The FAT information of the conversion table generated by the logical sector number / MMP file recording position conversion table generation / selection unit 210 is written to the SYS management read buffer 222 (step S83), and the sector number to be read next is determined. Set in the command packet (step S8
4).

Then, whether or not the sector number is the last sector of the file, that is, MSDOS. SYS2
It is determined whether or not the sector 20 is the last sector of the last read cluster requested (step S85). If not, the above processing is repeated from step S75.

The last sector of the file, that is, MSDOS. If it is the last sector that can also be input to the SYS 220, the DOS format matching unit 212 sets status = DONE in the command packet (step S86).

MSDOS. The SYS 220 sends this status to MSDOS. When read from the SYS management read buffer 222, the device driver MMP. SYS is closed (step S87), and the file reading process ends.

Next, the configuration including the layers 4 and 5 and the application process when the MMP playback device 28 is regarded as a character device will be described with reference to the functional block diagram of FIG.

That is, the layer 4 has the error processing unit 224A
224, processing parameter storage memory 226, subset generation unit 228, read buffer 23
0, command analyzer 232, read file selector 23
4 and an index file / general file read request unit 236. Among these, for example, the read buffer 230 through the index file / general file read request unit 236 are used by the device driver MMP.
Provided as SYS. That is, in this case, the MMP. S
The YS reads / writes data in 1-byte units, and stores data in a memory location specified by the application.

[0220] The layer 5 includes the MSDOS.MS file as a file management system. SYS238 and MSDOS. S
YS management read buffer 240.

The application process is a file
Read process 242 and read file location 24
4 and a process management data buffer 246.

The above file read process 242
Is the lead in the application process
A subroutine that sends a file read request including the read file position to MSDOS. Send to SYS238. At the same time, this file read process 2
Reference numeral 42 indicates to the user that the file is scanned by a scanner (not shown) by a display (not shown) or an audio output device (not shown).

MSDOS. SYS238 is a file
In response to a request from the read process 242, a read command is output.

The MMP. SYS command analyzer 232
Analyzes the command, and if the command is a read command, outputs the read file position to the read file selecting unit 234.

The read file selecting section 234 selects the read file. Actually, since the file to be scanned is specified in the application process, this indicates an operation selected by the user.

The index file / general file read request section 236 outputs a read service request signal to layer 3 and below.

Under the control of the controller 224, the subset generating section 228 generates a subset in the same manner as in the block type device described above.

Read buffer 230 temporarily stores the subset generated by subset generation section 228, and stores MSDOS. MSDOS.SYS which can be viewed from SYS238. The data is transferred to the SYS management read buffer 240.

Then, this MSDOS. The data once stored in the SYS management read buffer 240 is stored in the process management data buffer 246 as an application data unit.

FIG. 22 is a flowchart showing the operation in such a configuration.

First, the file read process 242
Is executed, and a file read request including a read file position is sent to MSDOS. At the same time, it outputs the read file position to the user (step S91).

MSDOS. The SYS 238 opens the file (step S92), and the device driver MM
P. SYS is opened (step S93), and a command packet is output (step S94).

The command analyzer 232 analyzes this command (step S95), and if it is not a read command (step S96), proceeds to another process corresponding to the command.

When the command is a read command,
A corresponding file read request is made to the read file selection unit 234 (step S97), and the user is caused to perform an operation for actually reading.

The index file / general file read request unit 236 determines whether or not the requested read position of the file is a position corresponding to the already read subset (step S98). If so, the process proceeds to step S102 as described later.

On the other hand, if it corresponds to the subset that has not been read yet, the index file / general file read request unit 236 executes a file read process using the function of the layer 3 or lower (step S99).

As a result, since the subset elements are input from the layer 3 to the subset generation section 228 (step S100), the subset generation section 228 generates a subset and outputs it to the read buffer 230 (step S101). .

Then, from this read buffer 230, MS
DOS. The data is transferred to the SYS management read buffer 240 in byte units (step S102).

When the transfer is completed, the controller 224 sets the status word of the command packet to DONE by using 4-SDU2 (step S1).
03).

MSDOS. The SYS 238 determines whether the reading of the subset has been completed (step S1).
04) If not, return to step S98 and repeat the above processing.

When the reading of the subset is completed, the MSDOS. The SYS 238 determines whether the reading of the file has been completed (step S10).
5) If not, return to step S97 and repeat the above processing.

If reading of the file has been completed, MSDOS. The read file data is transferred from the SYS management read buffer 240 to the process management data buffer 246 (step S106).

Then, MSDOS. SYS238 is a device driver MMP. SYS is closed (step S107), and the file is closed (step S10).
8) Finish the processing.

The process management data buffer 2
46 is not always necessary, and MSDOS. S
Only the storage position of the YS management read buffer 240 may be notified.

Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the scope of the present invention. . Here, the summary of the present invention is as follows.

(1) From an information recording medium having a portion where multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code pattern, First hierarchical processing means for optically reading, converting the read code into code data as an image, and adding the read-related information to the code data as first processing information and outputting the first processing information;
Recognizing the first processing information output from the first hierarchical processing means, processing the code data output from the first hierarchical processing means, and collecting the code data for each predetermined unit. Second hierarchical processing means for generating and outputting a block, and a second hierarchical processing means for collecting blocks output from the second hierarchical processing means and generating at least a second macro macroblock of a predetermined unit larger than the second hierarchical processing means Is extracted from the code data of the block and recognized, a super macro block is generated based on the second processing information, and the third processing information for performing the process related to the error countermeasure is obtained by the super processing. The macro macro block is extracted and recognized, and a process related to a countermeasure against an error of the super macro block is performed based on the third processing information. A third for outputting a subset element generated discretely on the basis of the third processing information
And fourth processing information at least necessary to generate a subset consisting of a predetermined unit of code capable of restoring the multimedia information from the subset elements output from the third hierarchical processing means. A fourth hierarchical processing means for extracting a subset generated based on the fourth processing information by extracting from the subset element, and restoring the subset output from the fourth hierarchical processing means. Output means for outputting as multimedia information,
The third hierarchical processing means is connected by the block code data connecting means for reconstructing code data (block user data) of the block by the second processing information (block header), and the block code data connecting means. Macroblock header constructing means for gathering a plurality of blocks of first data provided at predetermined positions of each block code data to constitute macroblock header information, and the macroblock header constituted by the macroblock header constructing means An information reproducing apparatus, comprising: super macroblock forming means for collecting the second data other than the first data of each block code data based on information to form the super macroblock.

That is, since the size of the subset element and the concatenation information can be described in the macroblock header according to the structure of the application file, the addition of invalid data can be suppressed as much as possible, and more valid data can be recorded. As a result, the effects of the invention described below can be obtained.

(2) The above code pattern is read from an information recording medium having a portion in which multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code pattern. First hierarchical processing means for optically reading, converting the read code into code data as an image, and adding the read-related information to the code data as first processing information and outputting the first processing information;
Recognizing the first processing information output from the first hierarchical processing means, processing the code data output from the first hierarchical processing means, and collecting the code data for each predetermined unit. Second hierarchical processing means for generating and outputting a block, and a second hierarchical processing means for collecting blocks output from the second hierarchical processing means and generating at least a second macro macroblock of a predetermined unit larger than the second hierarchical processing means Is extracted from the code data of the block and recognized, a super macro block is generated based on the second processing information, and the third processing information for performing the process related to the error countermeasure is obtained by the super processing. The macro macro block is extracted and recognized, and a process related to a countermeasure against an error of the super macro block is performed based on the third processing information. A third for outputting a subset element generated discretely on the basis of the third processing information
And fourth processing information at least necessary to generate a subset consisting of a predetermined unit of code capable of restoring the multimedia information from the subset elements output from the third hierarchical processing means. A fourth hierarchical processing means for extracting a subset generated based on the fourth processing information by extracting from the subset element, and restoring the subset output from the fourth hierarchical processing means. Output means for outputting as multimedia information,
The third hierarchical processing means is provided at a predetermined position of each block code data combined by the block code data combining means for reconstructing the block code data by the second processing information. Macroblock header composing means for collecting the first data for a plurality of blocks to constitute a macroblock header, and macroblock header error correcting means for performing error correction processing on the macroblock header constituted by the macroblock header composing means. A macroblock correction means for correcting an uncorrectable portion which cannot be corrected by the macroblock header error correction means by the adjacent macroblock header, and an error correction by the macroblock header error correction means or by the macroblock correction means. Corrected Super macroblock forming means for forming a super macroblock by concatenating (deinterleaving) second data other than the first data of each block code data based on the macroblock header information; and Super macroblock error correcting means for correcting an error in a super macroblock formed by the forming means, and subset element forming means for dividing and connecting the super macroblock corrected by the super macroblock error correcting means to form a subset element An information reproducing apparatus comprising:

That is, in the information recording medium (paper) in which many errors occur, especially when data is lost in units of block data, the configuration of the super macroblock can be adaptively changed by the information in the macroblock header. ,
The addition of invalid information can be suppressed as much as possible, and more effective data (contents of the application file) can be recorded. As a result, the effects of the invention described later can be obtained.

(3) The second processing information includes a block address and a block code data size, and the block code data combining means includes a memory for storing data output from the second hierarchical processing means. When,
A memory control unit that calculates a storage memory address of the memory from the block address and the block code data size, and stores the data in the memory according to the memory address to reconstruct the block code data. The information reproducing apparatus according to the above (1) or (2).

That is, there is no need to sequentially input block data from the second hierarchical processing means. In other words, for example, even if the user scans the code in the reverse direction when optically reading the code from the information recording medium, even if the block data is input in the reverse order from the second hierarchical processing means, the third hierarchical level is input. Processing after the processing means can be performed correctly.

(4) The second processing information includes a block address, an error state flag thereof, and a block code data size, and the block code data combining means outputs data output from the second hierarchical processing means. For storing a plurality of address error state flags, a storage memory address of the memory calculated from the block address and the block code data size, and an address stored in the flag storage means. The information reproducing apparatus according to (1) or (2), further comprising: memory control means for controlling data storage at the calculated memory address using the error state flag.

That is, when the block data of the same address is input in duplicate, the data writing and replacement are controlled according to the error state (erroneous correction state) of the block address. Error occurrence rate can be reduced.

(5) The second processing information includes a block address, an error state flag thereof, a block code data size, and the number of block code data demodulation errors. A memory for storing data output from the processing means, a flag storage means for storing a plurality of the address error state flags, an error number storage means for storing a plurality of the block code data demodulation errors, the block address and A storage memory address of the memory is calculated from the block code data size, and the calculated memory is calculated based on the address error state flag stored in the flag storage unit and the block code data demodulation error number stored in the error number storage unit. The method that controls data storage at the address The information reproducing apparatus according to the above (1) or (2), further comprising a memory control means.

That is, when the block data of the same address is input in duplicate and the error state of the block address is the same, the block data is replaced according to the number of demodulation errors of the block data. The incidence can be reduced.

(6) The second processing information includes a block address, an error state flag thereof, a block code data size, and a block code data demodulation error position.
A memory for storing data output from the hierarchy processing means, a flag storage means for storing a plurality of the address error state flags, an error position storage means for storing a plurality of the block code data demodulation error positions, and the block The storage memory address of the memory in the predetermined unit is calculated from the address, the block code data size, and the block code data demodulation error position, and the address error flag stored in the flag storage means and the error position storage means are calculated. (1) or (2), characterized by having a memory control means for controlling data storage at the calculated memory address for each of the predetermined units according to the block code data demodulation error position stored in the memory. The information reproducing apparatus according to the above.

In other words, when block data of the same address is overlapped and input, if the error state of the block address is the same, a predetermined unit in the block data, ie, demodulation, is performed according to the demodulation error position of the block data. By performing replacement in data units, the error rate of block data can be reduced.

(7) The macroblock header is interleaved and has at least one of an error correction check symbol and an error detection check symbol added thereto.
A third interleaving means for deinterleaving the macroblock header information;
Error correction decoding means for performing error correction decoding of the macroblock header deinterleaved by the deinterleaving means, and error detection of the macroblock header deinterleaved by the deinterleaving means or error corrected and decoded by the error correction decoding means The information reproducing apparatus according to (1), further comprising at least one of an error detection decoding means for performing

That is, since the error occurring in the macroblock header can be corrected or detected, the configuration of the subset element can be performed without error.

(8) The macroblock header is interleaved and has at least one of an error correction check symbol and an error detection check symbol added thereto.
A third interleaving means for deinterleaving the macroblock header information;
A macroblock header deinterleaved by the deinterleaver using the erasure position calculator that calculates the information erasure position from the block address and the block address error state flag, and the erasure position calculated by the erasure position calculator. At least one of error correction decoding means for performing error correction decoding of the macroblock header and error detection decoding means for performing error detection of a macroblock header deinterleaved by the deinterleaving means or error corrected and decoded by the error correction decoding means. The information reproducing apparatus according to (4), further comprising:

That is, it is possible to further improve the ability to correct an error occurring in a macroblock header.

(9) The macroblock header is interleaved and added with at least one of an error correction check symbol and an error detection check symbol.
A third interleaving means for deinterleaving the macroblock header information;
An erasure position calculating unit for calculating an information erasure position from the block address, the block address error state flag, and the block code data demodulation error position; and the deinterleaving unit using the erasure position calculated by the erasure position calculation unit. Error correction decoding means for performing error correction decoding of the macroblock header deinterleaved in step 2, and error detection for performing error detection of the macroblock header deinterleaved by the deinterleaving means or error corrected and decoded by the error correction decoding means The information reproducing apparatus according to (6), further comprising at least one of decoding means.

That is, it is possible to further improve the ability to correct an error occurring in the macroblock header.

(10) The second data is interleaved and at least one of an error correction check symbol and an error detection check symbol is added.
A super macroblock generating means for deinterleaving the second data to generate the super macroblock, and an error for performing error correction decoding of the super macroblock generated by the super macroblock generating means. The apparatus further comprises at least one of a correction decoding unit and an error detection decoding unit that detects an error of a super macroblock generated by the super macroblock generation unit or error-corrected by the error correction decoding unit. The information reproducing apparatus according to the above (1).

That is, by correcting an error occurring in a super macro block, it is possible to prevent an error from occurring in data in a subset element.

(11) The second data is interleaved, and at least one of an error correction check symbol and an error detection check symbol is added.
A super macroblock generating means for deinterleaving the second data to generate the super macroblock, and an erasure position calculating means for calculating an information erasure position from the block address and the block address error state flag Error correction decoding means for performing error correction decoding of the super macroblock generated by the super macroblock generation means, using the erasure position calculated by the erasure position calculation means, and the super macroblock generation means. The information reproducing apparatus according to (4), further comprising at least one of an error detection decoding means for detecting an error of a super macroblock which has been subjected to error correction or decoding by the error correction decoding means. .

That is, the ability to correct an error occurring in a super macroblock can be further improved.

(12) The second data is interleaved and at least one of an error correction check symbol and an error detection check symbol is added.
A super macroblock generating means for deinterleaving the second data to generate the super macroblock, and information loss from the block address, the block address error state flag, and the block code data demodulation error position. Erasure position calculation means for calculating a position, and error correction decoding means for performing error correction decoding of the super macroblock generated by the super macroblock generation means, also using the erasure position calculated by the erasure position calculation means. And at least one of error detection and decoding means for detecting an error of a super macroblock generated by the super macroblock generation means or error-corrected and decoded by the error correction decoding means. Reproduction of information described in 6) Location.

That is, it is possible to further improve the ability to correct an error occurring in a super macroblock.

(13) The macroblock header is characterized in that parameters relating to the interleaving of the second data and at least one of the error correction check symbol and the error detection check symbol are described in the macroblock header. An information reproducing apparatus according to claim 1.

That is, since the error correction method of the second data can be described in the macroblock header according to the error occurrence characteristics of the information recording medium (such as the type of paper), it is more suitable for the second data. Error correction can be performed.

(14) The macroblock header includes a parameter constituting a subset element obtained by collecting a plurality of data obtained by deinterleaving the second data and performing error correction or error detection, in the predetermined unit.
The information reproducing device according to (1) or (2), wherein the connection parameter of the subset element is described.

That is, the size of the subset element and the concatenation information can be described in the macroblock header according to the error correction method and the structure of the application file, so that addition of dummy data is suppressed as much as possible, and more effective data is recorded. become able to.

(15) The macro block header is:
While being interleaved, an error correction check symbol and an error detection check symbol are added, and the macroblock header forming means includes a deinterleave means for deinterleaving the macroblock header information formed by the macroblock header forming means. Wherein the macroblock header error correction means includes error correction decoding means for performing error correction decoding of the macroblock header deinterleaved by the deinterleaving means, and wherein the third hierarchical processing means comprises the error correction decoding means. The information reproducing apparatus according to the above (2), further comprising an error detection decoding means for detecting an error of the macroblock header error-corrected and decoded in the above.

That is, since the error occurring in the macroblock header can be corrected or detected, the configuration of the subset element can be performed without error.

(16) The third hierarchical processing means further includes an erasure position calculating means for calculating an information erasure position from the block address and the block address error state flag. The information reproducing apparatus according to (4), wherein error correction of the macroblock header configured by the macroblock header configuration unit is performed using the erasure position calculated by the position calculation unit.

That is, it is possible to further improve the ability to correct an error occurring in the macroblock header.

(17) The macroblock header is:
An error detection check symbol is added, and the third hierarchical processing means uses the erasure position calculated by the erasure position calculation means to correct the macroblock header error-corrected by the macroblock header error correction means. The information reproducing apparatus according to the above (16), further comprising an error detection decoding means for detecting the error.

That is, the ability to correct an error occurring in the macroblock header can be further improved.

(18) The third hierarchical processing means further includes an erasure position calculation means for calculating an information erasure position from the block address, the block address error state flag, and the block code data demodulation error position. (6) wherein the header error correction means performs error correction of the macroblock header configured by the macroblock header configuration means, also using the erasure position calculated by the erasure position calculation means. The information reproducing apparatus according to the above.

That is, the ability to correct an error occurring in the macroblock header can be further improved.

(19) The macro block header is:
An error detection check symbol is added, and the third hierarchical processing means uses the erasure position calculated by the erasure position calculation means, and uses the macroblock header error correction means to correct the error of the macroblock header. The information reproducing apparatus according to the above (18), further comprising an error detection decoding means for detecting the error.

That is, it is possible to further improve the ability to correct an error occurring in the macroblock header.

(20) An error detection check symbol is added to the second data, and the third hierarchical processing means detects an error in a super macroblock error-corrected by the super macroblock error correction means. The information reproducing apparatus according to the above (2), further comprising an error detection decoding means for performing the following.

That is, by correcting an error occurring in a super macroblock, it is possible to prevent an error from occurring in data in a subset element.

(21) The third hierarchical processing means further comprises an erasure position calculating means for calculating an information erasure position from the block address and the block address error state flag, and the super macroblock error correcting means comprises: The information reproducing apparatus according to (4), wherein the error correction of the super macro block formed by the super macro block forming means is performed using the erasure position calculated by the position calculating means.

That is, the ability to correct an error occurring in a super macroblock can be further improved.

(22) An error detection check symbol is added to the second data, and the third hierarchical processing means uses the erasure position calculated by the erasure position calculation means to calculate the super data. (21) The information reproducing apparatus according to (21), further including an error detection decoding unit that detects an error of the super macroblock whose error has been corrected by the macroblock error correction unit.

That is, it is possible to further improve the ability to correct an error occurring in a super macroblock.

(23) The third hierarchical processing means further comprises an erasure position calculating means for calculating an information erasure position from the block address, block address error state flag, and block code data demodulation error position, and the super macro (6) wherein the block error correction means performs error correction of the super macroblock constituted by the super macroblock construction means, also using the erasure position calculated by the erasure position calculation means. The information reproducing apparatus according to the above.

That is, it is possible to further improve the ability to correct an error occurring in a super macroblock.

(24) An error detection check symbol is added to the second data, and the third hierarchical processing means uses the erasure position calculated by the erasure position calculation means to calculate the super data. (23) The information reproducing apparatus according to (23), further including an error detection decoding unit configured to detect an error of the super macroblock corrected by the macroblock error correction unit.

That is, the ability to correct an error occurring in a super macroblock can be further improved.

(25) The parameter according to (20), wherein the parameter relating to the interleave of the second data and at least one of the error correction check symbol and the error detection check symbol is described in the macroblock header. An information reproducing apparatus according to claim 1.

That is, since the error correction method for the second data can be described in the macroblock header according to the error occurrence characteristics of the information recording medium (paper type, etc.), the method is more suitable for the second data. Error correction can be performed.

(26) An information recording medium having a portion in which multimedia information including at least one of audio information, video information, and digital code data is recorded in an optically readable code pattern, In an information recording medium whose pattern includes processing information necessary for editing data in accordance with a restoring process of reading the code pattern and restoring the original multimedia information, the restoring process is performed by a predetermined number of layers. This hierarchical structure is composed of a first logical layer (layer 5) having a file management function and a first predetermined data unit (subset element) to collect a second predetermined data unit (subset element). ) Is generated and converted to generate a data transfer unit (sector) handled by the first logical layer (layer 5). And a third logic having a function of reading the code pattern from the information recording medium, performing a predetermined restoration process, and outputting the first predetermined data unit. An information recording medium having at least a layer (layer 3 or lower).

That is, by providing processing information necessary for the restoration processing in the code pattern, a plurality of processing methods or processing parameters can be selected. In addition, the restoration processing is not limited to a specific processing method, and it is extremely easy to perform a restoration processing by adding an appropriate processing method according to a medium such as a sound or a picture or an excellent method to be generated in the future.

[0279] Furthermore, by constructing a function for matching the read code pattern with the specified data structure and the transfer procedure by hierarchizing and restoring the read code pattern, the use of the existing file management system is facilitated and the data of the application process is used. Acquisition method compatibility can be realized.

(27) The first logical layer is a prescribed file management system (such as MSDOS.SYS / UNIX) that handles prescribed data unit structures according to prescribed procedures.
The information recording medium according to the above (26), wherein:

That is, by having the function of converting the read code pattern, the read data can be managed using the file management system which has been widely used, so that the excessive labor for creating the file management system can be saved. Ease of handling for users of the data,
Affinity can be guaranteed.

(28) The second logical layer receives the first predetermined data unit (subset element) output from the third logical layer and inputs the second predetermined data unit (subset). Is generated and converted into a specified data transfer unit (sector) handled by the first logical layer, and the converted specified data transfer unit (sector) is adapted to a data transfer procedure according to specified file management. (26) characterized by having data matching means.
An information recording medium according to claim 1.

That is, it is not necessary that the read code pattern has a data structure defined by the file management system, and the flexibility in the structural design of the code pattern is enhanced.

(29) The second logical layer has means for analyzing an identification code of a data unit (sector) required from the first logical layer and instructing reading of a corresponding data area. The information recording medium according to (26), wherein:

That is, the file management system does not need to have any unspecified functions for data input / output, and can easily obtain management target data from a code pattern.

(30) The second logical layer generates an analysis table of the second predetermined data unit (subset) corresponding to the identification code of the data unit (sector) requested from the first logical layer. (26) The information recording medium according to the above (26), further comprising:

That is, since an analysis table can be generated in response to a request from the file management system, even if a predetermined file group managed by the index is different, the file management can be performed reliably and easily (that is, the target information can be easily managed). Can be obtained reliably).

(31) The information recording medium according to (27), wherein the data unit (sector) generated in the second logical hierarchy has at least management information necessary for the file management system. .

That is, since information necessary for the data management function (data transfer protocol) of the file management system is included in the code pattern, when the file management system requests information necessary for management, it is immediately and surely. Can respond to.

(32) The second predetermined data unit (subset) generated in the second logical hierarchy is a function (index function) similar to a function file (directory entry or the like) defined by the file management system. The information recording medium according to the above (27), comprising:

That is, by having index information necessary for the file management system in the code pattern, the file management method defined by the file management system can be realized, which is convenient. Also, the index function
It is possible to efficiently manage a relatively large number of files, or to realize an application for efficiently searching for a desired file, thereby expanding the range of use of the pattern code.

(33) The second predetermined data unit (subset) generated in the second logical hierarchy is preceded by a standard name identifier registered in advance, which can standardize and represent a part of file management information. The information recording medium according to the above (26), wherein:

That is, as the subset standard name identifier, it is possible to omit part of the file management information (subset header) or to appropriately select the description structure itself of the file management information. In addition, such information can be replaced with a small amount of data, so that additional information can be reduced and the storage capacity of information data can be increased.

(34) The second predetermined data unit (subset) generated in the second logical hierarchy controls an information code (user data), which is data other than file management information, and the information code. And (2) predetermined processing information (subset data control header) for
An information recording medium according to 6).

That is, by having the file management information (subset header) and the information code management information (subset data control header) in a double structure, the subset data is simply treated as a management target, and Can be separated and then treated as an information unit. Therefore, simple file management and efficient management of information units by the subset data control header can be performed without knowing the contents of the information.

(35) The second predetermined data units (subsets) generated in the second logical hierarchy are pre-defined so that the structure of the predetermined processing information (subset data control header) can be standardized and expressed. (34) The information recording medium according to the above (34), which includes a registered name code (user data format type).

That is, the name code (user data format type) is the information code (user data)
It is possible to omit some information (information related to data compression, etc.) for decompression, and to appropriately select the description structure of the information code itself. In addition, such information can be replaced with a small amount of data, so that additional information can be reduced and the storage capacity of information data can be increased.

[0298]

As described in detail above, according to the present invention,
It is possible to provide an information reproducing apparatus and an information recording medium that can more reliably reproduce a code pattern and can cope with a future change in the structure of the code pattern itself.

[Brief description of the drawings]

FIG. 1 is a block diagram of a layer 3 according to an embodiment.

FIG. 2 is a diagram showing a format of a dot code.

FIG. 3 is a diagram showing an example of hierarchical division of an information transfer protocol in a multimedia paper system.

FIG. 4 is a diagram showing an example of a structure of a lower layer in a reproduction-side hierarchical structure.

FIG. 5 is a diagram showing an example of a structure of an upper layer in a hierarchical structure on a reproduction side.

FIGS. 6A to 6D are diagrams each showing an example of the structure of block data passed from layer 2, and FIG. 6E is a diagram showing four states of a block address error state flag.

FIG. 7 is a block diagram showing a modification of Layer 3;

8A is a diagram illustrating an example of the structure of a macroblock header, FIG. 8B is a diagram illustrating the actual two-dimensional structure of the macroblock header in FIG. 8A, and FIG. 8C is a diagram illustrating the structure of FIG. It is a figure which shows the modification of.

9A is a diagram illustrating a more specific example of the structure of a macroblock header, FIG. 9B is a diagram illustrating the actual two-dimensional structure of the macroblock header in FIG. 9A, and FIG. B)
It is a figure which shows the modification of the structure of FIG.

FIG. 10 is a diagram illustrating a structure example of a super macro block.

FIG. 11A is a diagram showing another example of the structure of a super macroblock, and FIG. 11B is a diagram showing an example of the structure of a subset element.

FIGS. 12A and 12B are FIGS. 10 and 1 respectively.
It is a figure which shows the modification of the structure of the super macro block of 1 (A).

FIG. 13 is a flowchart for explaining the operation of Layer 3.

14A is a diagram illustrating a structure example of subset element data, FIG. 14B is a diagram illustrating a structure example of a head subset of a file, and FIG. 14C is a diagram illustrating a structure example of a general subset of a file; It is.

FIGS. 15A to 15C are diagrams each showing a configuration example of a subset format.

16A is a diagram illustrating an example of a subset configuration of a general file, and FIG. 16B is a diagram illustrating an example of a subset configuration of an index file.

FIG. 17 is a diagram showing a relationship between a subset element, a subset, and a file.

FIG. 18 is a functional block diagram showing a configuration of layers 4 and 5 when the MMP playback device is viewed as a block device.

FIG. 19 is a diagram showing the first half of a series of flowcharts for explaining the operation in the configuration of FIG. 18;

20 is a diagram showing the latter half of a series of flowcharts for explaining the operation in the configuration of FIG. 18;

FIG. 21 is a functional block diagram showing a configuration of layers 4 and 5 when the MMP playback device is viewed as a character device.

FIG. 22 is a flowchart illustrating an operation in the configuration of FIG. 21;

[Explanation of symbols]

66, 200, 224 controller, 68, 70 selector, 72, 74 buffer memory, 76 block header identification unit, 78 memory controller, 80 macroblock header deinterleave unit, 82 macroblock header ECC (error Correction section, 84 macroblock header identification section, 86 header correction section, 88 super macroblock deinterleave section, 90 super macroblock ECC section, 92 subset element configuration section, 94 parameter storage memory, 96 Set standard identification code, 98: user data format type, 100: block address, 102: block user data size (number of data in block), 104:
Block user data, 106: block address error state flag (with / without block address compensation),
108: Number of block user data demodulation errors, 110
... Block user data demodulation error position, 112, 1
44: set standard identification code, 114, 146: user data format type, 116: macroblock connection information, 118: SMB (super macroblock)
Interleave scheme information, 118 '... SMB interleave length, 120 ... SMB error correction scheme information, 120'
... SMB error correction code length, 122 ... SMB error detection method information, 122 '... SMB error detection presence / absence determination flag, 124,148 ... Subset element connection information,
126, 150: subset element user data size, 128, 138: error detection check symbol, 130,
132, 140, 142 ... error correction check symbol, 134
... subset element data, 136 ... dummy data, 152 ... subset element user data, 1
54... Assigned subset ID number, 156... Subset generation reference standard ID number, 158... Number of subset elements constituting the subset, 160... Subset generation structure identifier, 162, 194. MMP file type, 168 ... subset ID number, 170 ... subset link information, 172 ... affiliated file ID number, 174 ...
Page number, 176: Position in page, 178: File name, 180: File structure type, 182: DOS file type, 184: DOS file attribute, 186: Book name, 188: Book ID number, 190: User data format Type (UFT), 192 ... Subset data control header (SDCH), 1
96 ... Subset header, 198 ... Index, 2
00A, 224A: Error processing unit, 202, 226: Processing parameter storage memory, 204, 228: Subset generation unit, 206: File type identification unit, 208: Index parameter required parameter detection / analysis unit, 2
10: Logical sector number / MMP file recording position conversion table generation / selection unit, 212: DOS format data matching processing unit, 214, 232: Command analysis unit, 21
6 logical sector number analysis section, 218 corresponding read file read request section, 220, 238 MSDOS. SY
S, 222, 240... MSDOS. SYS management read buffer, 230 read buffer, 234 read file selection section, 236 index file / general file read request section, 242 file read process, 244 read file position, 246 process management data buffer, N -SDUn: Nth Layer Service Data Unit, No. n
), N-PDUn... N-layer protocol data unit n
No. (Nth Layer Protocol DataUnit, No.n), N-PC
In: Nth Layer Protocol Control Information, No.
n), N-UDn ... Nth layer user data nth (Nth Layer U)
ser Data, No.n), ADU: Application Data Unit, ACH: Application Control Header
rol Header).

Continued on the front page (72) Inventor Hiroyoshi Fujimori 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Inventor Shinichi Imade 2-43-2 Hatagaya, Shibuya-ku, Tokyo Ori Inside (72) Inventor Shinzo Matsui 2-43-2 Hatagaya, Shibuya-ku, Tokyo In-house Olympus Optical Corporation (72) 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. F-term (reference) 5B035 BB08 BC05 5B072 BB00 CC21 HH11

Claims (8)

[Claims] 1. An information recording medium comprising a portion in which multimedia information including at least one of audio information, video information, and digital code data is recorded in an optically readable code pattern. An information reproducing apparatus for optically reading the code pattern and reproducing data of a first predetermined unit from the read code pattern; and an information reproducing apparatus for reading the multimedia information. Processing information extracting means for extracting, from the data of the first predetermined unit, processing information necessary for generating data of the second predetermined unit from the data of the first predetermined unit reproduced in the step (a); First error correction means for performing error correction on the processing information extracted by the means, A data generating means for generating the data of the second predetermined unit from the data of the first predetermined unit based on the processing information on which the error correction has been performed by the correct means; and a second data generated by the data generating means. An information reproducing apparatus, comprising: second error correction means for performing error correction of data of a predetermined unit. 2. The method according to claim 1, wherein the second error correction means includes the first error correction means.
2. The information reproducing apparatus according to claim 1, wherein the second predetermined unit of data is error-corrected based on the error-corrected processing information. 3. The processing information is interleaved, and the processing information extracting means includes means for deinterleaving the processing information.
An information reproducing apparatus according to claim 1. 4. When the data generation means collects a plurality of data of the first predetermined unit and generates the data of the second predetermined unit, the processing information includes the plurality of first data. The information reproducing apparatus according to claim 1, wherein the information reproducing apparatus is distributed in a predetermined unit. 5. An information recording medium comprising a portion in which multimedia information including at least one of audio information, video information, and digital code data is recorded in an optically readable code pattern, wherein the code pattern An information reproducing apparatus that optically reads the code pattern and outputs the multimedia information; optically reads the code pattern; and reproduces a first predetermined unit of data from the read code pattern. Processing information extracting means for extracting, from the data of the first predetermined unit, processing information necessary for generating data of the second predetermined unit from the data of the first predetermined unit reproduced by the reproducing means; First error correction means for performing error correction on the processing information extracted by the information extraction means; Means for generating the data of the second predetermined unit from the data of the first predetermined unit based on the processing information on which the error correction has been performed by the means; and a second data generated by the data generation means. An information recording medium, characterized by comprising: a second error correction means for performing error correction of data in a predetermined unit, wherein the code pattern further includes the processing information. 6. The information reproducing apparatus according to claim 2, wherein the second error correction means performs error correction of the data of the second predetermined unit based on processing information on which error correction has been performed by the first error correction means. 6. The method according to claim 5, wherein
An information recording medium according to claim 1. 7. The processing information according to claim 5, wherein the processing information is interleaved, and the processing information extracting means in the information reproducing apparatus includes means for deinterleaving the processing information. Information recording medium. 8. When the data generating means of the information reproducing apparatus collects a plurality of data of the first predetermined unit and generates data of the second predetermined unit, the processing information includes: The information recording medium according to claim 5, wherein the information recording medium is distributed in each of the first predetermined units.